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Measurement of the W±Z boson pair-production cross section in pp collisions at s=13 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2864
2016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 762, 1-22 p.Article in journal (Refereed) Published
Abstract [en]

The production of W±Z events in proton–proton collisions at a centre-of-mass energy of 13 TeV is measured with the ATLAS detector at the LHC. The collected data correspond to an integrated luminosity of 3.2 fb−1. The W±Z candidates are reconstructed using leptonic decays of the gauge bosons into electrons or muons. The measured inclusive cross section in the detector fiducial region for leptonic decay modes is σW±Z→ℓ′νℓℓ fid.=63.2±3.2(stat.)±2.6(sys.)±1.5(lumi.) fb. In comparison, the next-to-leading-order Standard Model prediction is 53.4−2.8 +3.6 fb. The extrapolation of the measurement from the fiducial to the total phase space yields σW±Z tot.=50.6±2.6(stat.)±2.0(sys.)±0.9(th.)±1.2(lumi.) pb, in agreement with a recent next-to-next-to-leading-order calculation of 48.2−1.0 +1.1 pb. The cross section as a function of jet multiplicity is also measured, together with the charge-dependent W+Z and W−Z cross sections and their ratio.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 762, 1-22 p.
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Physical Sciences
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URN: urn:nbn:se:kth:diva-197692DOI: 10.1016/j.physletb.2016.08.052ISI: 000388473700001Scopus ID: 2-s2.0-84987971181OAI: oai:DiVA.org:kth-197692DiVA: diva2:1052944
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QC 20161207

Available from: 2016-12-07 Created: 2016-12-07 Last updated: 2017-03-27Bibliographically approved

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